Time-Dependent Mechanical Response of Ice Adhesion on Aluminum Substrates

• DOI: 10.1021/acsami.0c22083
• Publication Date: 2021-03-16T20:21:17Z
• Authors: Marina Machado; Teresa Reilly; Vladimir Alvarado; John Ackerman; Joseph Murphy; William Rice
• Keywords: 02 engineering and technology; 0210 nano-technology

Ice adhesion on aerospace-relevant materials is both complex and not well understood. Measuring such understanding the underlying physics involved require reliable testing techniques that can yield multifaceted data sets. The latter includes surface morphology, is, roughness, its spatial correlation structure, resolving substrate-induced strain, direct mechanical of adhesion. As part a continuing investigation ice relevant surface, we performed time-dependent stress ramps aluminum surfaces. temperature range explored, from −20 to −7 °C, allowed spontaneous icing morphologies, namely, below or above −15 °C. Additionally, characterized roughness maps specimens. Our novel test protocol yields reproducible high-precision results when compared with alternative methods reported throughout literature. stress-ramp using proposed show apparent average critical (proportional strength) depends rate temperature. More specifically, strength higher for rates increases decreasing full span adhesive behavior particularly upper bound. Additional stress-concentration analysis needed correct this effect thereby rather than value produced by our procedure. in work should aid improve mechanisms.